Grave and complicated pollution problems are posed by the existence of heavy metals trendy environment and this has been a focus of study all over the world. The Activated carbonized avocado pear seed (ACAPS) and activated carbonized orange peel (ACOP) were each soaked with potassium hydroxide (KOH) solution at a 1:1 ratio, for 48 hours, the outcome was washed, air-dried and separately oven dried at 105℃ for 6 hours and further heated in a muffle furnace (Carbolite AAF1100) at 2500C for 1 hour. The ACAPS and ACOP obtained were physicochemical characterized with scanning electron microscope (SEM) and Fourier-transform infrared (FT-IR) spectrophotometer. Ni2+ ions adsorption route on ACAPS as well as ACOP was considered by means of batch adsorption isotherm investigation. Adsorption forms was assessed by Freundlich, Langmuir, DRK, Tempkin as well as Flory-Huggin isotherm models. SEM picture, show that ACAPS posessed an enormous amount of different dimension pores and the ACOP had smaller amount of pores of smaller sizes. The R2 obtained varies from 0.92 to 1.00 and it points to the fact that all the isotherm simulation was competent to clarify the correlation in the data we got. ACAPS had more adsorption site, however, ACOP took up more Ni2+ ion per adsorption site on comparing Flory-Huggins isotherm model nFH values vis-a-vis Langmuir isotherm model qm values. In conclusion, ACAPS was a superior adsorbent when matched with ACOP, it was more than twice as effective for taking out Ni2+ ions from contaminated water owing to a blend of its enormous amount of different size openings and the functional groups on its surface, with a qm value of 18.18 and 8.70 mg/g in that order.